Email: [email protected]
Phone: +91 93135 43530
Address: 133/1 Ground, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad-380004, Gujarat, India
O-Ring Supplier India — NBR EPDM Viton — KELOR
Manufacturer-direct supply of O-Rings — NBR (Nitrile) · EPDM · Viton (FKM) · PTFE (Teflon) · Silicone (VMQ) — DIN 3771 Metric / AS568 / ISO 3601 / JIS B2401 — ID 1 mm to 500 mm — 70 Shore A standard — OEM bulk supply as per customer drawing or sample — valve seal · hydraulic · pneumatic · pharma · food GMP.
Bulk MOQ 10,000 Nos · Custom to Drawing Available · GST Invoice (GSTIN: 24AKLPP6499B1ZT) · Pan India Dispatch · 2-Hour Quote
O-Ring Product Photos — KELOR Industrial Seals
NBR (Nitrile) O-Rings — DIN 3771 Standard Sizes — Black · 70 Shore A — Industrial Supplier Ahmedabad
Silicone O-Rings — Food Grade · Red / Translucent — Food, Pharma, Dairy Application
🏭 OEM & Bulk Manufacturing — Custom O-Rings as Per Your Drawing or Sample
We supply O-rings directly from our manufacturing partner — not a trading middleman. This means:
- ✅ Custom sizes — any ID × CS not in standard DIN/AS568 range, manufactured to your drawing dimensions
- ✅ Custom material compounds — hardness 40 to 90 Shore A; any standard or special elastomeric compound on request
- ✅ OEM batch supply — consistent compound, hardness, and dimensional tolerance batch-to-batch for valve assemblers and OEM manufacturers
- ✅ Sample matching — send us your worn or failed O-ring; we identify the material by testing and match the compound
- ✅ Private label — O-rings supplied in your brand packaging with your part number
- ✅ Bulk pricing — manufacturer-direct pricing; 30–50% lower than trading-house prices at equivalent quality
Minimum Order Quantity — OEM Bulk: 10,000 Nos per size per material
An O-ring is a circular elastomeric or PTFE seal — torus-shaped with a round cross section — compressed between two mating surfaces to prevent leakage of liquid or gas. O-rings are the most widely used seals in Indian industrial equipment — valves, pumps, hydraulic cylinders, pneumatic actuators, heat exchangers, and process equipment — because they are economical, available in multiple materials, and can seal practically all media when the correct material and hardness are specified.
Krishna Industries (KELOR), Ahmedabad, supplies O-rings manufactured in India — in all standard grades and custom compounds — directly to valve manufacturers (OEMs), hydraulic and pneumatic equipment assemblers, pharma and food GMP plant operators, and industrial MRO stores across India. GST invoice. Pan India dispatch.
💰 O-Ring Price List — Approximate Ex-Works Ahmedabad, GST Extra (Valid for 30 Days · Project Pricing on WhatsApp)
NBR 70 Shore A O-Ring Price — DIN 3771 Standard Sizes
Below prices are for NBR (Nitrile) 70 Shore A, black, DIN 3771 standard sizes, MOQ 10,000 Nos. For other materials, see the material price multiplier table below.
| ID Range (mm) | Cross Section (mm) | Typical DIN Ref | Price / Pc (INR) | MOQ |
|---|---|---|---|---|
| 5 – 14 | 1.5 – 2.0 | DIN 3771 A 5×1.5 to 14×2 | ₹2 – ₹5 | 10,000 Nos |
| 15 – 30 | 2.0 – 2.5 | DIN 3771 A 15×2 to 30×2.5 | ₹3 – ₹8 | 10,000 Nos |
| 32 – 60 | 2.5 – 3.5 | DIN 3771 A 32×3.5 to 60×3.5 | ₹5 – ₹12 | 10,000 Nos |
| 65 – 100 | 3.5 – 5.0 | DIN 3771 A 65×5.3 to 100×5.3 | ₹10 – ₹20 | 10,000 Nos |
| 105 – 200 | 5.0 – 7.0 | DIN 3771 A 109×5.3 to 200×7 | ₹18 – ₹45 | 10,000 Nos |
| 210 – 350 | 5.0 – 7.0 | DIN 3771 A 210×7 to 350×7 | ₹40 – ₹120 | 10,000 Nos |
| 360 – 500 | 7.0 – 12.0 | DIN 3771 B / Cord & Vulcanise | ₹100 – ₹350 | 10,000 Nos |
O-Ring Material Price Comparison — Per Piece (Approx.)
Prices shown for ID 25–50 mm × CS 2.5–3.5 mm range, MOQ 10,000 Nos, DIN 3771. Larger sizes change per-piece rate.
NBR (Nitrile)
₹5–10
Base price · Oil · Hydraulic · General purpose
EPDM
₹7–12
Water · Steam · HVAC · Biocide
HNBR
₹12–25
Hot oil · H2S · Oilfield
Silicone (VMQ)
₹12–30
Food · Pharma · Static seals
Viton (FKM)
₹30–80
Chemical · High-temp · Refinery
PTFE Encapsulated
₹60–180
Universal chemical · Pharma GMP
💡 Bulk pricing note: Above prices are approximate for standard sizes at MOQ 10,000 Nos per size. Custom sizes (non-standard ID × CS) are priced on drawing — WhatsApp your drawing for quote within 24 hours. Prices vary with raw material market — firm quote provided on WhatsApp. For project BOM pricing (50+ sizes mixed): WhatsApp your BOM — project pricing within 2 hours.
📥 Need O-Ring Price Right Now? — WhatsApp, Get Quote in 2 Hours
Share your requirement: Material (NBR / EPDM / Viton) · Size (ID × CS or AS568 dash) · Quantity · Delivery city — Instant approximate pricing on WhatsApp
📲 WhatsApp Your Requirement 📧 Email InquiryO-Ring Material Selection Guide — NBR vs EPDM vs Viton vs PTFE vs Silicone
Wrong material selection is the #1 cause of O-ring failure in India. An NBR O-ring in steam service fails within hours. An EPDM O-ring in oil service swells within minutes. Use this guide before specifying.
NBR (Nitrile)
Buna-N · Most Common · General Purpose- Mineral oil, hydraulic oil, diesel, fuel
- Compressed air (without ozone)
- LPG, natural gas (low aromatic)
- Non-polar solvents
- Water up to 80°C
EPDM
Ethylene Propylene · Water / Steam Specialist- Hot water and steam (up to 150°C)
- HVAC cooling water with biocide
- Potable water (FDA / WRAS grade)
- Dilute acids and alkalis
- Ozone and UV-exposed outdoor
- Brake fluid, ketones, alcohol
Viton (FKM)
Fluorocarbon · Chemical & High-Temp Specialist- Petroleum and aromatic solvents
- Hot oil above 120°C
- Concentrated acids (nitric, sulphuric)
- Chlorinated solvents, chlorine
- Refinery process service
- Automotive engine high-temp
PTFE (Teflon)
Polytetrafluoroethylene · Universal Chemical Resistance- Virtually all chemicals including concentrated acids
- Pharmaceutical and food GMP service
- Cryogenic applications (LN2, LO2)
- High-purity water systems
- Strong oxidisers (nitric acid, bromine)
Silicone (VMQ)
Food & Pharma Grade · High & Low Temperature- Food contact applications
- Pharmaceutical GMP equipment
- High-temperature static seals
- Cryogenic to +230°C range
- Medical devices and implants
HNBR
Hydrogenated Nitrile · High-Temp Oil Service- Hot oil and fuel above 120°C (NBR limit)
- Oilfield and downhole equipment
- H2S (sour gas) service
- Automotive power steering, A/C
- Steam/oil combination service
Shore A Hardness — Why 70 Shore A Is Standard and When to Change
Hardness (Shore A durometer) is the second most critical O-ring specification after material. Most valve and hydraulic seals use 70 Shore A — but not all applications are the same:
| Hardness | Typical Use | Characteristic | Specify When |
|---|---|---|---|
| 40–50 Shore A | Very soft — face seals, low-squeeze grooves | Very conformable, seals rough surfaces; low compression set resistance | Vacuum service, extremely low pressure, rough surface finish flanges |
| 60 Shore A | Soft — ball valve seats, low-pressure face seals | Good conformability; acceptable extrusion resistance up to ~10 bar | Low-pressure water valves, delicate equipment, soft substrate seals |
| 70 Shore A ⭐ | Standard — the default for 90% of applications | Balanced conformability and extrusion resistance; suits most DIN/AS568 groove dimensions | All standard industrial valves, hydraulic cylinders, pneumatic actuators up to ~100 bar |
| 80 Shore A | Hard — high-pressure hydraulics, dynamic seals | High extrusion resistance; less conformable to surface | Hydraulic pressure above 100 bar; high-speed dynamic seals (piston, rod) |
| 90 Shore A | Very hard — extreme pressure, back-up rings | Maximum extrusion resistance; used with softer primary O-ring | Hydraulic above 200 bar; acts as anti-extrusion back-up ring behind 70 Shore O-ring |
O-Ring Size Standards — DIN 3771, AS568, ISO 3601, JIS B2401
We supply to all four major O-ring dimensional standards used in India. Specify the standard and size designation clearly on your purchase order — do not mix standards as groove dimensions differ slightly between systems.
| Standard | System | How to Specify | Used In India For |
|---|---|---|---|
| DIN 3771 | Metric (mm) | ID × CS in mm — e.g. “40 × 3.5 DIN 3771” | German-origin industrial equipment; most Indian valve and pump OEMs; all equipment with metric drawings |
| AS568 | Imperial (inch) | Dash number — e.g. “-214 AS568” | US-standard equipment (ANSI B16.5 flanges, American-designed process equipment); petrochemical EPC projects |
| ISO 3601 | Metric (mm) | Size code — ID × CS to ISO table | International specification projects — equivalent to DIN 3771 in most sizes |
| JIS B2401 | Metric (mm) | P-series (piston/rod) or G-series (face seal) | Japanese OEM equipment — automotive, heavy machinery from Japanese manufacturers |
| Custom (Drawing) | Any | ID × CS + tolerance ± mm, Shore A, material compound | Non-standard sizes for any OEM application — manufactured to your drawing |
OEM Custom O-Ring — How the Process Works
For OEM bulk orders of custom O-rings (non-standard sizes, special compounds, or per-drawing specifications), here is the exact process from inquiry to delivery:
Share Drawing or Sample
WhatsApp your O-ring drawing (ID, CS, tolerance, material, Shore A, standard, quantity) — or send a physical sample for compound identification and matching.
Compound Confirmation + Quote
We confirm material compound, hardness, and dimensional tolerance feasibility within 24 hours. Price and lead time quoted based on MOQ 10,000 Nos per size per material.
Sample / Prototype
First article samples (typically 5–10 Nos per size) despatched within 7–14 working days for your dimensional and functional approval before bulk production.
Bulk Production & Dispatch
On approval: bulk production 15–30 working days (depending on quantity and compound). GST invoice included. Pan India dispatch or export packing on request.
Types of O-Rings We Supply
Standard Rubber O-Ring
NBR / EPDM / Viton / Silicone / HNBR- Compression-moulded elastomeric ring
- DIN 3771 / AS568 / ISO 3601 / JIS B2401 standard dimensions
- 70 Shore A standard; 40–90 Shore A available
- Black (standard) / coloured (material identification) on request
- MOQ: 10,000 Nos per size per material
Custom / Non-Standard O-Ring
As Per Drawing · Any ID × CS- Any ID from 1 mm to 500 mm, any CS from 1 mm to 15 mm
- Tight tolerances: ±0.05 mm for precision valve seals
- All elastomeric compounds including HNBR, Neoprene, Aflas, FFKM on request
- First article samples before bulk production
- MOQ: 10,000 Nos per size per material
PTFE Encapsulated O-Ring
Direct Rubber Replacement · Chemical Resistant- FEP or PTFE jacket over elastomeric (Viton or Silicone) core
- Installs in standard rubber O-ring grooves — no groove modification
- Full PTFE chemical resistance with rubber elasticity and springback
- Standard for chemical, pharma, and food GMP applications where pure rubber is inadequate
- MOQ: 10,000 Nos per size per material
Cord (Vulcanised / Bonded) O-Ring
Large Diameter · On-Site Fabrication- Rubber cord cut to length and vulcanised (bonded) to form O-ring
- For very large diameter O-rings (above 500 mm) not economical to mould
- Available in NBR, EPDM, Viton, Silicone cord
- Dimensional accuracy ±1–2 mm — suitable for large static face seals, flange gasket grooves
- MOQ: 10,000 Nos per size per material
Coloured O-Ring (Material ID)
Maintenance Coding · MRO- Standard colour coding: NBR = black, EPDM = grey/blue, Viton = brown/green, Silicone = red/translucent
- Custom colour available for OEM material identification systems
- Prevents wrong-material installation in maintenance — critical for valve assemblers and hydraulic repair shops
- Same dimensional and material specs as standard black O-rings
- MOQ: 10,000 Nos (custom colour)
Pharma / Food Grade O-Ring
Food GMP · Pharma- Food-grade Silicone, EPDM, Viton, PTFE for food and pharma process equipment
- Pharmaceutical GMP-grade compounds for drug contact applications
- Dairy and beverage processing grade Silicone and EPDM
- Material test report (MTR) available on request for pharma GMP documentation
- MOQ: 10,000 Nos per size per material
Standard Cross Section (CS) Sizes — DIN 3771 Reference
DIN 3771 defines standard cross section diameters. The CS selection depends on the groove width in the mating component. Standard CS values used in India:
| Cross Section — CS (mm) | Typical ID Range | Typical Application | Groove Width (mm) |
|---|---|---|---|
| 1.0 mm | 1 – 9 mm | Miniature instrument valves, small hydraulic cartridges | 1.2 |
| 1.5 mm | 4 – 20 mm | Small valve stems, instrument fittings, pneumatic solenoids | 1.8 |
| 2.0 mm | 8 – 45 mm | Valve bonnets, actuator stems, instrument connections | 2.4 |
| 2.5 mm | 15 – 75 mm | Butterfly valve shaft seals, ball valve seat O-rings, pneumatic cylinders | 3.0 |
| 3.0 mm | 20 – 100 mm | Gate / globe valve bonnet seals, hydraulic cylinder head seals | 3.6 |
| 3.5 mm | 30 – 200 mm | Flanged valve body seals, heat exchanger cover seals | 4.2 |
| 5.0 mm | 50 – 300 mm | Large valve body seals, manhole cover seals, large flange O-ring grooves | 6.0 |
| 7.0 mm | 100 – 500 mm | Very large static face seals, large bore valve body seals | 8.4 |
ℹ️ How to specify for OEM ordering:
Complete specification for a standard O-ring: “40.0 × 3.5 NBR 70 Shore A DIN 3771 — 10,000 Nos”
Complete specification for a custom O-ring: “ID 62.5 ± 0.2 mm × CS 4.0 ± 0.1 mm, Viton 70 Shore A, black — as per drawing No. XYZ-123 — 10,000 Nos”
For sample matching: WhatsApp us a photo of the O-ring with a ruler for scale, and the equipment make/model. We identify and match.
Complete specification for a standard O-ring: “40.0 × 3.5 NBR 70 Shore A DIN 3771 — 10,000 Nos”
Complete specification for a custom O-ring: “ID 62.5 ± 0.2 mm × CS 4.0 ± 0.1 mm, Viton 70 Shore A, black — as per drawing No. XYZ-123 — 10,000 Nos”
For sample matching: WhatsApp us a photo of the O-ring with a ruler for scale, and the equipment make/model. We identify and match.
🔧 O-rings paired with KELOR valves? If you need O-rings for valve assembly — also check our Butterfly Valve · Wafer Check Valve · Fire Fighting Check Valve pages — single supplier for valve + seal = one GST invoice, one dispatch.
Applications — OEM & Industrial Markets We Supply
🔧 Valve Manufacturers (OEM)
EPDM, NBR, Viton O-rings for butterfly valve shaft seals, ball valve seat seals, and gate valve bonnet seals — consistent compound, tight dimensional tolerance, batch-to-batch consistency.
⚙️ Hydraulic & Pneumatic
NBR 70 and 80 Shore A for hydraulic cylinder piston and rod seals, pneumatic actuator seals, and directional control valve body seals.
🍽️ Food & Pharma GMP
Food-grade Silicone, EPDM, and Viton for food processing, dairy, beverage, and pharmaceutical equipment — with material test reports on request.
⛽ Oil, Gas & Refinery
Viton FKM for refinery process valve seals, crude oil service, H2S/sour gas (HNBR), and high-temperature hydrocarbon service above 120°C.
❄️ HVAC & Water Treatment
EPDM for butterfly valve shaft seals in chilled water, condenser water, biocide-treated HVAC cooling circuits, and potable water systems.
⚗️ Chemical Processing
Viton, PTFE encapsulated, and HNBR for aggressive chemical service — acids, solvents, chlorinated compounds, and chemical process valves.
🚗 Automotive & Engineering
NBR, HNBR, and Viton for engine oil seals, fuel system seals, transmission, and power steering in automotive OEM and aftermarket supply.
🔩 MRO & Maintenance
Assortment kits in NBR, EPDM, and Viton across DIN 3771 standard sizes for industrial plant maintenance stores — single GST invoice for mixed-size orders.
How to Order — OEM Bulk O-Rings
For OEM Bulk O-Rings (MOQ 10,000 Nos) — WhatsApp or Email:
1. Material — NBR / EPDM / Viton / PTFE / Silicone / HNBR
2. Standard — DIN 3771 / AS568 / ISO 3601 / JIS B2401
3. Size — ID × CS in mm (DIN) or Dash number (AS568)
4. Shore A hardness — 70 standard; specify if different
5. Colour — Black standard; grey/brown/coloured on request
6. Quantity (Nos) — minimum 10,000 per size per material
7. Delivery location
For Custom O-Rings — additionally provide:
8. Drawing with ID, CS, tolerances (±mm), and surface finish requirements
9. OR send a physical sample by courier to our Ahmedabad address
10. Batch quantity and annual volume (helps price per piece)
11. First article / prototype samples required? Yes / No
📱 WhatsApp: +91 93135 43530 | 📧 Email: [email protected]
📍 Address for sample sending: 133/1 Ground Floor, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad – 380004, Gujarat
1. Material — NBR / EPDM / Viton / PTFE / Silicone / HNBR
2. Standard — DIN 3771 / AS568 / ISO 3601 / JIS B2401
3. Size — ID × CS in mm (DIN) or Dash number (AS568)
4. Shore A hardness — 70 standard; specify if different
5. Colour — Black standard; grey/brown/coloured on request
6. Quantity (Nos) — minimum 10,000 per size per material
7. Delivery location
For Custom O-Rings — additionally provide:
8. Drawing with ID, CS, tolerances (±mm), and surface finish requirements
9. OR send a physical sample by courier to our Ahmedabad address
10. Batch quantity and annual volume (helps price per piece)
11. First article / prototype samples required? Yes / No
📱 WhatsApp: +91 93135 43530 | 📧 Email: [email protected]
📍 Address for sample sending: 133/1 Ground Floor, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad – 380004, Gujarat
Why OEMs & Bulk Buyers Choose Krishna Industries
🏭
Direct Manufacturer Access
We source directly from our manufacturing partner — not a trader reselling. Manufacturer-direct pricing means 30–50% lower cost vs trading houses at the same quality level.
📐
Custom to Drawing
Any ID × CS combination manufactured to your drawing. Tight tolerances ±0.05 mm for precision valve and instrument applications. First article samples before bulk commitment.
🔄
Batch-to-Batch Consistency
Critical for OEM valve assemblers — same compound, same hardness, same dimensional tolerance across all batches. Material test report with each batch confirming compound conformance.
📄
GST-Compliant Documentation
GST invoice (GSTIN: 24AKLPP6499B1ZT), material test report, dimensional inspection report — all documentation included as required per application.
⚡
Fast Quote Response
Quote within 2 hours on WhatsApp for standard sizes. Custom drawings quoted within 24 hours. First article samples in 7–14 working days. Bulk production 15–30 working days.
✅
GSTIN Verified
GSTIN: 24AKLPP6499B1ZT | IEC: AKLPP6499B. Full GST-compliant billing. All invoices valid for ITC (Input Tax Credit) claims.
Get O-Ring Price — Standard or Custom — 2-Hour Response
NBR · EPDM · Viton · PTFE · Silicone · DIN 3771 / AS568 · Custom to Drawing · OEM Bulk MOQ 10,000 Nos · First Article Samples · GST Invoice · Pan India Dispatch
📲 WhatsApp Inquiry 📧 Email Inquiry📝 Send Your O-Ring Inquiry — We Reply Within 2 Hours
Quick Specification Summary
| Materials | NBR (Nitrile) · EPDM · Viton (FKM) · PTFE / FEP Encapsulated · Silicone (VMQ) · HNBR · Neoprene (CR) · Aflas (FEPM) · FFKM on request |
| Hardness Range | 40 to 90 Shore A (70 Shore A standard) |
| Standards | DIN 3771 (metric) · AS568 (inch) · ISO 3601 · JIS B2401 |
| ID Range | 1 mm to 500 mm (moulded) · Above 500 mm by cord and vulcanise |
| CS Range | 1.0 mm to 15.0 mm standard; custom on request |
| Dimensional Tolerance | Per DIN 3771 / AS568 standard; ±0.05 mm for precision OEM on request |
| Colours | Black (standard) · Material-coded colours · Custom colour for OEM |
| MOQ | 10,000 Nos per size per material per batch |
| Lead Time — Samples | 7–14 working days |
| Lead Time — Bulk Production | 15–30 working days from sample approval |
| HSN Code | 40169300 (rubber O-rings) / 39173900 (PTFE) |
| GST Rate | 18% (HSN 4016) / 18% (HSN 3917) |
| GSTIN | 24AKLPP6499B1ZT |
Related Products — Krishna Industries (KELOR)
Pan India Supply Coverage
O-rings dispatched from Ahmedabad to: Mumbai, Pune, Nashik, Nagpur, Aurangabad (Maharashtra) · Chennai, Coimbatore, Bengaluru, Hyderabad, Visakhapatnam (South India) · Delhi NCR, Noida, Gurugram, Ludhiana (North India) · Kolkata, Jamshedpur, Bhubaneswar (East India) · Jaipur, Indore, Bhopal, Lucknow, Kanpur (Central India) · Surat, Vadodara, Rajkot, Vapi, Ankleshwar, Dahej, Bharuch (Gujarat) and all other industrial cities.
Frequently Asked Questions — O-Rings
What is the difference between NBR and EPDM O-rings — they look the same?
Both NBR and EPDM O-rings are typically black and visually identical. The material difference is critical: NBR (Nitrile) is designed for oil, fuel, diesel, hydraulic oil, and compressed air service — it swells and fails immediately in hot water, steam, biocide-treated HVAC cooling water, and ozone exposure. EPDM is designed for hot water, steam, HVAC cooling water (including biocide-treated), and ozone service — it swells immediately in mineral oil, petroleum products, diesel, and hydraulic oil. Using NBR in steam service causes failure within hours; using EPDM in oil service causes failure within minutes. Field identification: a drop of diesel applied to the O-ring surface — NBR is unaffected, EPDM swells slightly within 60 seconds. Always confirm the correct material from the original equipment parts manual before ordering replacements.
Can you manufacture O-rings to my drawing or sample — what is the process?
Yes — this is one of our primary services. For drawing-based orders: WhatsApp or email the drawing with ID, CS, tolerances, material compound, Shore A hardness, colour, and annual volume. We confirm feasibility and price within 24 hours. First article samples (5–10 Nos) are produced and despatched within 7–14 working days for your dimensional and functional approval. Bulk production begins after sample approval — typically 15–30 working days for the first bulk batch depending on compound and quantity. For sample-based orders: send a physical sample or failed O-ring to our Ahmedabad address; we identify the compound by testing and match it for replacement supply. MOQ for custom is 10,000 Nos per size per material.
What is the difference between DIN 3771 and AS568 O-ring sizes?
DIN 3771 is the German metric system — O-rings are specified by ID × CS in millimetres (e.g. 40 × 3.5 means 40mm inner diameter, 3.5mm cord section). AS568 is the American inch system — O-rings are specified by a dash number from a standard table (e.g. -214 corresponds to 1.359″ ID × 0.139″ CS). The two systems have different dimensional series and different groove designs. An AS568 O-ring does not directly substitute for a DIN 3771 O-ring even if the actual dimensions are close — the groove width and depth are designed for specific CS dimensions. Always specify which standard applies based on the equipment country of origin or drawing specification. For metric equipment (European, Indian, Japanese): DIN 3771. For American-designed equipment (ANSI flanges, US process plant): AS568. We supply both.
When should I use Viton instead of NBR?
Specify Viton (FKM) when: (1) service temperature exceeds 120°C continuous — Viton handles up to 200°C vs NBR’s 120°C limit; (2) the fluid is an aromatic solvent, chlorinated solvent, concentrated acid, or chemical that attacks NBR; (3) the service involves ozone, UV, or outdoor exposure above what NBR can handle; (4) the application is in a refinery or petrochemical plant processing aromatic hydrocarbons. NBR is the correct and more economical choice for standard oil, hydraulic, diesel, and fuel service below 120°C. Viton costs significantly more than NBR — confirm that NBR’s limits are genuinely exceeded before specifying Viton.
Is PTFE O-ring a direct replacement for a rubber O-ring of the same dimensions?
Solid PTFE O-rings cannot be directly installed in standard rubber O-ring grooves — PTFE has no elasticity and does not self-energise under fluid pressure. Fitting solid PTFE in a standard groove results in immediate leakage. Two correct approaches: (1) specify PTFE encapsulated O-ring (FEP or PTFE jacket over Viton or Silicone core) — the elastomeric core provides springback and self-energisation, fitting standard rubber grooves while providing full PTFE chemical resistance; (2) redesign the groove for solid PTFE — requires tighter groove dimensions (20–30% squeeze vs 15–25% for rubber) and a retaining ring. For replacement applications, always specify PTFE encapsulated type unless you are redesigning the sealing groove. Send the groove drawing when ordering solid PTFE O-rings.
What is the price of O-ring in India?
NBR O-ring price India approximate ex-works Ahmedabad for DIN 3771 standard at MOQ 10,000 Nos: ID 5-14mm Rs 2-5 per piece, ID 15-30mm Rs 3-8, ID 32-60mm Rs 5-12, ID 65-100mm Rs 10-20, ID 105-200mm Rs 18-45, ID 210-350mm Rs 40-120, ID 360-500mm Rs 100-350. EPDM adds 20-30 percent over NBR. Silicone adds 100-150 percent. Viton FKM adds 400-600 percent. PTFE encapsulated adds 600-800 percent. Prices are approximate and vary with raw material market — firm quote provided on WhatsApp within 2 hours.
What is the minimum order quantity for O-rings?
MOQ is 10,000 Nos per size per material per batch for both standard DIN 3771 / AS568 sizes and custom sizes manufactured to drawing. First article samples (5-10 Nos) are provided before bulk production commitment. Mixed size orders welcome — single GST invoice for all sizes.
What is the delivery time for O-rings from Ahmedabad?
First article samples (5-10 Nos) are despatched within 7-14 working days. OEM bulk production takes 15-30 working days from sample approval, depending on quantity and material compound. Pan India dispatch via VRL Professional Courier DTDC — transit time 2-7 working days depending on delivery city. Express dispatch available for urgent requirements at additional cost.
Can you match an O-ring from a worn or failed sample?
Yes — send a physical sample by courier to our Ahmedabad address with equipment details. We identify the compound by visual inspection, hardness testing, and chemical resistance test within 2-3 working days. We match the material and produce replacement O-rings. First article samples are despatched for your approval before bulk production. MOQ is 10,000 Nos per size per material.
Do you supply food grade and pharma grade O-rings?
Yes — we supply food-grade Silicone, EPDM, Viton, and PTFE O-rings suitable for food processing, dairy, beverage, and pharmaceutical GMP equipment. Material test reports (MTR) confirming compound grade are available on request. For pharmaceutical equipment, compound declaration and extractables/leachables data can be requested. Specify the food or pharma grade requirement at time of inquiry so we confirm the correct compound grade.
📞 Still reading? — Just WhatsApp Your O-Ring Size, Get Price in 2 Hours
NBR ₹2/piece onwards · EPDM ₹7/piece onwards · Viton ₹30/piece onwards · OEM bulk MOQ 10,000 Nos O-Ring Supplier India — NBR EPDM O-Ring Supplier India — NBR EPDM
📲 WhatsApp Now — +91 93135 43530